fix: model fallback routing for all model types and default model selection
Backend: When ENABLE_CUSTOM_MODEL_FALLBACK is active and a custom model's
base model is unavailable, the fallback now swaps the model and form data
to the configured default model directly. This ensures routing uses the
fallback model's type (pipe, Ollama, or OpenAI) instead of the original
model's type, which previously caused "Model not found" errors when the
fallback was a different backend type.
Frontend: Fixed default model selection in new chat initialization where
the admin-configured default models were always overwritten by the first
available model. The first-available fallback now only triggers when the
configured defaults don't resolve to valid available models.
This commit adds aria-labels to the text inputs and textareas that previously lacked them, applies role=switch to inputs, and adds accessible titles to floating quick actions.
fix: reset taskIds and messageQueue on new chat
Fixes a bug where clicking "New Chat" after sending a message would
silently drop subsequent messages. The initNewChat function reset most
chat state but did not clear taskIds or messageQueue, causing
submitPrompt to queue messages indefinitely instead of sending them.
- Replace incorrect aria-roledescription='model-item' with role='option' and aria-selected on ModelItem.svelte. The previous attribute was not a valid ARIA role description and provided no useful information to screen readers.
- Add contextual aria-label to each model item button (e.g. 'Select GPT-4 model') instead of just the raw model name, making the action clear to screen reader users.
- Add role='listbox' and aria-label='Available models' to the scrollable model list container in Selector.svelte so screen readers announce the container's purpose and navigate items correctly.
- Make the model selector trigger button's aria-label dynamic: it now announces 'Selected model: GPT-4' when a model is selected, falling back to 'Select a model' when nothing is selected.
- Add aria-label to the eject (unload) button in ModelItem.svelte so screen readers announce its purpose.
- Add aria-label to the cancel download button in Selector.svelte with the specific model name being canceled.
- Improve model profile image alt text from generic 'Model' to contextual '{{modelName}} profile image'.
fix: gate model default features on global config and user permissions
If you disabled code interpreter globally and in user permissions but
enabled it as a default feature on a model, the code interpreter pill
still appeared in the chat input. Same issue for web search and image
generation.
The setDefaults function in Chat.svelte activated model default features
based solely on the model's capability flag, ignoring whether the feature
was globally enabled or allowed by user permissions. Added the same
global config and user permission checks already used by the integrations
menu visibility and the features object sent to the backend.
